* {
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
}

html,body {
    width: 100%;
    height: 100%;
}

 .nav {
    width: 100%;
    height: 50px;
    background-color: rgba(0, 0, 0, 0.441);
    color: white;
    display: flex;
    align-items: center;
}

 .nav span {
    margin-left: 15px;
}

.login_container {
    width: 100%;
    height: calc(100% - 50px);
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: url(../images/0.jpg);
    background-repeat: no-repeat;
    background-size: cover;
}

.login_container .login_dialog {
    width: 400px;
    height: 300px;
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: 10px;
}

.login_container .login_dialog h3 {
    text-align: center;
    line-height: 100px;
}

.login_container .login_dialog .row {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 50px;
}

.login_container .login_dialog .row span {
    width: 100px;
    margin-right: 10px;
    font-size: 20px;
}

.login_container .login_dialog .row input {
    height: 25px;
    border-width: 0px;
    border-radius: 10px;
    text-indent: 1em;
}

.login_container .login_dialog button {
    width: 250px;
    height: 35px;
    text-align: center;
    margin-left: 75px;
    border-radius: 10px;
    border-width: 0px;
    background-color: greenyellow;
}

.login_container .login_dialog button:active {
    background-color: gray;
}

.login_container .login_dialog a {
    display: block;
    width: 300px;
    text-align: center;
    text-decoration: none;
    color: black;
    margin-top: 10px;
}
